In-tank, on-shot characterization of the OMEGA laser system focal spot
Abstract
Direct-drive fusion implosion experiments using the 60-beam OMEGA Laser System require ~1% rms uniformity on target. Measurements from laser diagnostics indicate that beam-to-beam power variation has been sufficiently reduced such that the uniformity nearly meets this requirement; however, experimental results suggest otherwise. To better understand this discrepancy, a full-beam-in-tank diagnostic has been developed to characterize the on-shot, full-energy focal spot of a single beam inside the target chamber using a small sample of the beam from the final optic assembly. In this paper, we describe the diagnostic and present the results of commissioning experiments.
- Authors:
-
- Univ. of Rochester, NY (United States)
- Publication Date:
- Research Org.:
- Univ. of Rochester, NY (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1502136
- Grant/Contract Number:
- NA0003856
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Proc. SPIE
- Additional Journal Information:
- Journal Volume: 10898; Conference: SPIE LASE 2019, San Francisco, CA (United States), 2-7 Feb 2019
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; diagnostics; laser systems engineering; wavefronts; near field optics; CCD cameras; fusion energy
Citation Formats
Waxer, Leon J., Bauer, Katelynn, Cost, Emil, Heimbueger, Matthew, Kelly, John H., Kobilansky, Victor, Morse, Samuel, Nelson, David, Peck, Robert, Rinefierd, Robert, Sampat, Siddharth, Shoup, Milton J., Weiner, David, Weselak, Gregory, and Zou, Jun. In-tank, on-shot characterization of the OMEGA laser system focal spot. United States: N. p., 2019.
Web. doi:10.1117/12.2506792.
Waxer, Leon J., Bauer, Katelynn, Cost, Emil, Heimbueger, Matthew, Kelly, John H., Kobilansky, Victor, Morse, Samuel, Nelson, David, Peck, Robert, Rinefierd, Robert, Sampat, Siddharth, Shoup, Milton J., Weiner, David, Weselak, Gregory, & Zou, Jun. In-tank, on-shot characterization of the OMEGA laser system focal spot. United States. https://doi.org/10.1117/12.2506792
Waxer, Leon J., Bauer, Katelynn, Cost, Emil, Heimbueger, Matthew, Kelly, John H., Kobilansky, Victor, Morse, Samuel, Nelson, David, Peck, Robert, Rinefierd, Robert, Sampat, Siddharth, Shoup, Milton J., Weiner, David, Weselak, Gregory, and Zou, Jun. Mon .
"In-tank, on-shot characterization of the OMEGA laser system focal spot". United States. https://doi.org/10.1117/12.2506792. https://www.osti.gov/servlets/purl/1502136.
@article{osti_1502136,
title = {In-tank, on-shot characterization of the OMEGA laser system focal spot},
author = {Waxer, Leon J. and Bauer, Katelynn and Cost, Emil and Heimbueger, Matthew and Kelly, John H. and Kobilansky, Victor and Morse, Samuel and Nelson, David and Peck, Robert and Rinefierd, Robert and Sampat, Siddharth and Shoup, Milton J. and Weiner, David and Weselak, Gregory and Zou, Jun},
abstractNote = {Direct-drive fusion implosion experiments using the 60-beam OMEGA Laser System require ~1% rms uniformity on target. Measurements from laser diagnostics indicate that beam-to-beam power variation has been sufficiently reduced such that the uniformity nearly meets this requirement; however, experimental results suggest otherwise. To better understand this discrepancy, a full-beam-in-tank diagnostic has been developed to characterize the on-shot, full-energy focal spot of a single beam inside the target chamber using a small sample of the beam from the final optic assembly. In this paper, we describe the diagnostic and present the results of commissioning experiments.},
doi = {10.1117/12.2506792},
journal = {Proc. SPIE},
number = ,
volume = 10898,
place = {United States},
year = {Mon Mar 04 00:00:00 EST 2019},
month = {Mon Mar 04 00:00:00 EST 2019}
}
Web of Science
Works referenced in this record:
National direct-drive program on OMEGA and the National Ignition Facility
journal, October 2016
- Goncharov, V. N.; Regan, S. P.; Campbell, E. M.
- Plasma Physics and Controlled Fusion, Vol. 59, Issue 1
Random Phasing of High-Power Lasers for Uniform Target Acceleration and Plasma-Instability Suppression
journal, September 1984
- Kato, Y.; Mima, K.; Miyanaga, N.
- Physical Review Letters, Vol. 53, Issue 11
Direct-drive-implosion experiments with enhanced fluence balance on OMEGA
journal, January 2004
- Marshall, F. J.; Delettrez, J. A.; Epstein, R.
- Physics of Plasmas, Vol. 11, Issue 1
A focal-spot diagnostic for on-shot characterization of high-energy petawatt lasers
journal, January 2008
- Bromage, J.; Bahk, S. -W.; Irwin, D.
- Optics Express, Vol. 16, Issue 21
Works referencing / citing this record:
Inferred UV fluence focal-spot profiles from soft x-ray pinhole-camera measurements on OMEGA
journal, February 2020
- Theobald, W.; Sorce, C.; Donaldson, W. R.
- Review of Scientific Instruments, Vol. 91, Issue 2
The impact of magnetic fields on cold streams feeding galaxies
journal, August 2019
- Berlok, Thomas; Pfrommer, Christoph
- Monthly Notices of the Royal Astronomical Society, Vol. 489, Issue 3